Changing Worlds



All the text within the Unit 4 SPB has been created using relative font sizes; you can use your browser's text size option to adjust the text size.

All text can be accessed using all standard screen readers.

The text should ideally be viewed at Medium/Normal depending on your browser.


All links within the site appear in Blue and are underlined on rollover. As some browsers may be able to extract the links from each page, every effort has been made to provide titles for the links.


Every effort has been made to ensure that no information is dependent on an image or colour.

Accessibility Resources

Web Accessibility Initiative WAI – the W3C guide to accessibility.